akaihola
commented
3 years ago Oh, it's actually from OpenCV. According to Rust OpenCV imgproc documentation and an OpenCV tutorial, it
- produces a b/w image, not a grayscale one
- accepts an odd integer for a block size (suggesting the slower per-pixel algorithm)
- uses just the the mean (or a Gaussian mean) of the pixel neighborhood for the threshold value
- doesn't have auto-detection for black levels and white levels
I'd say we're still aiming for something more sophisticated :)
samoylovfp
Experimented with this crate. It does produce a readable result but with some noise and no shades of gray. In any case source code for this method is quite interesting.
Also
Cargo.lockshould be checked in for applications, I think wording in the documentation is a little confusing, which threw you off.